| Patent application number | Description | Published |
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| 20080261153 | PLATE MAKING METHOD OF LITHOGRAPHIC PRINTING PLATE PRECURSOR - A plate-making method of a lithographic printing plate precursor includes: exposing imagewise a lithographic printing plate precursor including a support and an image-recording layer containing a binder polymer to cure an exposed area of the image-recording layer; and developing the exposed lithographic printing plate precursor with a development processing solution having pH of from 2.0 to 8.0, wherein the binder polymer has a structure including at least one of an amino group and an ammonium group, and the development processing solution contains at least one surfactant containing a nitrogen atom. | 10-23-2008 |
| 20090148793 | PROCESSING METHOD OF LITHOGRAPHIC PRINTING PLATE PRECURSOR - A processing method of a lithographic printing plate precursor includes: exposing imagewise a lithographic printing plate precursor comprising a support on a surface of which at least one of: a hydrophilizing treatment; and an undercoat layer has been provided and an image-recording layer, to cure an exposed area of the image-recording layer; and undergoing developing processing with an aqueous solution having pH of from 2 to 10, wherein the aqueous solution comprises an amphoteric surfactant and an anionic surfactant selected from an anionic surfactant having an aliphatic chain and a total number of carbon atoms included in the aliphatic chain of 6 or more and an anionic surfactant having an aromatic ring and a total number of carbon atoms of 12 or more, and a content of the anionic surfactant is from 0.1 to 3.3% by weight of the aqueous solution. | 06-11-2009 |
| 20090246701 | METHOD FOR PREPARING LITHOGRAPHIC PRINTING PLATE - A method for preparing a lithographic printing plate includes: exposing a lithographic printing plate precursor including a hydrophilic support, a photosensitive layer containing (A) a sensitizing dye having an absorption maximum in a wavelength range of from 350 to 450 nm represented by the formula (I) or (II) as defined herein, (B) a polymerization initiator, (C) a polymerizable compound and (D) a binder polymer and a protective layer in this order with laser of from 350 to 450 nm; and removing the protective layer and an unexposed area of the photosensitive layer in the presence of a developer having pH of from 9 to 11 and containing an alkali agent, a surfactant and a water-soluble polymer compound by an automatic processor. | 10-01-2009 |
| 20100055615 | METHOD OF PREPARING LITHOGRAPHIC PRINTING PLATE - A method for preparing a lithographic printing plate, includes: exposing imagewise a lithographic printing plate precursor including a hydrophilic support and an image-recording layer containing a sensitizing dye, a polymerization initiator, an addition polymerizable compound having an ethylenically unsaturated double bond and a binder polymer; and processing the imagewise exposed lithographic printing plate precursor in a state where the imagewise exposed lithographic printing plate precursor is immersed in a developing tank holding an aqueous solution having pH of 8.5 to 10.8 and containing a low molecular weight hydroxycarboxylate ion, a pH buffer agent and a surfactant with circulation of the aqueous solution between the developing tank and an external tank provided outside a processing path line including the developing tank so as to keep constant a liquid level of the aqueous solution in the developing tank. | 03-04-2010 |
| 20110020757 | METHOD OF PREPARING LITHOGRAPHIC PRINTING PLATE - To provide a method of preparing a lithographic printing plate which is safe, exhibits excellent developing property and processing ability, and enables processing with one solution by processing after image exposure, a negative lithographic printing plate precursor having an image-recording layer containing (i) a sensitizing dye, (ii) a photopolymerization initiator, (iii) an addition polymerizable compound having an ethylenically unsaturated double bond, and (iv) a binder polymer on a hydrophilic support with an aqueous solution containing a carbonate ion, a hydrogen carbonate ion and a water-soluble polymer compound. | 01-27-2011 |
| 20110146516 | METHOD OF PREPARING LITHOGRAPHIC PRINTING PLATE - According to a method of preparing a lithographic printing plate substantially comprising a step of imagewise exposing a negative lithographic printing plate precursor having an image-recording layer containing (i) a sensitizing dye, (ii) a photopolymerization initiator, (iii) an addition polymerizable compound having an ethylenically unsaturated double bond and (iv) a binder polymer on a support and a step of processing the exposed lithographic printing plate precursor with an aqueous solution containing a carbonate ion, a hydrogen carbonate ion and a surfactant, the processing property is improved, a printing plate free from the tackiness on the surface thereof can be provided, even when the printing plate is stored after the development until printing, deterioration of the printing durability does not occur, and it becomes possible to conduct one solution development with a weak alkaline processing solution. | 06-23-2011 |
| 20120295204 | PROCESSING METHOD OF LITHOGRAPHIC PRINTING PLATE PREURSOR - A processing method of a lithographic printing plate precursor includes: exposing imagewise a lithographic printing plate precursor comprising a support on a surface of which at least one of: a hydrophilizing treatment; and an undercoat layer has been provided and an image-recording layer, to cure an exposed area of the image-recording layer; and undergoing developing processing with an aqueous solution having pH of from 2 to 10, wherein the aqueous solution comprises an amphoteric surfactant and an anionic surfactant selected from an anionic surfactant having an aliphatic chain and a total number of carbon atoms included in the aliphatic chain of 6 or more and an anionic surfactant having an aromatic ring and a total number of carbon atoms of 12 or more, and a content of the anionic surfactant is from 0.1 to 3.3% by weight of the aqueous solution. | 11-22-2012 |
| Patent application number | Description | Published |
|---|
| 20080268372 | LITHOGRAPHIC PRINTING PLATE PRECURSOR - A lithographic printing plate precursor includes: a support; and a photosensitive layer containing a binder polymer containing a positively charged nitrogen atom in at least one of a main chain and a side chain of the binder polymer, a compound containing an ethylenically unsubstituted bond; and a radical polymerization initiator. | 10-30-2008 |
| 20090246702 | METHOD FOR PREPARING LITHOGRAPHIC PRINTING PLATE - A method for preparing a lithographic printing plate includes: exposing a lithographic printing plate precursor including a hydrophilic support, a photosensitive layer containing (A) a sensitizing dye having an absorption maximum in a wavelength range of from 350 to 450 nm represented by the formula (I) as defined herein, (B) a polymerization initiator, (C) a polymerizable compound and (D) a binder polymer and a protective layer in this order with laser of from 350 to 450 nm; and removing the protective layer and an unexposed area of the photosensitive layer in the presence of a developer having pH of from 9 to 11 and containing a carbonate ion, a hydrogen carbonate ion, a surfactant and a water-soluble polymer compound by an automatic processor. | 10-01-2009 |
| 20100047537 | METHOD OF PRODUCING LITHOGRAPHIC PRINTING PLATE - The present invention provides a method for producing a safe lithographic printing plate that exhibits an excellent developability and an excellent processing performance. The present invention also provides a method for producing a lithographic printing plate which enables single liquid processing and in which the obtained plate does not exhibit an impaired printing durability, does not exhibit a decline in printing durability even when the printing plate is stored after development before printing, and can inhibit the appearance of fingerprint scumming. A method of producing a lithographic printing plate is provided comprising: imagewise photoexposing a negative-working lithographic printing plate precursor that has an image-recording layer containing the (i), (ii), (iii), and (iv) described below on a hydrophilic support; and treating thereafter the imagewise-photoexposed negative-working lithographic printing plate precursor with an aqueous solution that has a pH of 8.5 to 10.8 and that contains a low molecular weight hydroxycarboxylic acid ion, a pH buffer, and a surfactant:
| 02-25-2010 |
| 20120145669 | PROCESS FOR MAKING RELIEF PRINTING PLATE AND RINSING LIQUID FOR MAKING RELIEF PRINTING PLATE - Provided is a process for making a relief printing plate in which a residue on the plate that is generated during engraving can be easily removed and a rinsing liquid for making a relief printing plate that is suitably used for the process for making a relief printing plate. | 06-14-2012 |
